JPH09310511A - Earthquake resistant reinforcing construction of existing building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide earthquake resistant reinforcing construction of the existing building capable of efficiently accomplishing reinforcing work for making it possible to reduce earthquake disaster without being hindered from keeping the use of dwelling units and daily lives of residents. SOLUTION: Earthquake resisting walls 24 are continuously constructed in the vertical direction from the first floor through the top floor to extend vertical earthquake resisting frames 28v to both sides of the span direction of dwelling units of both ends in the longitudinal direction of the existing building 10 of RC construction or SRC construction. Earthquake resisting walls 26 are continuously constructed to both sides of the span direction of a dwelling unit 18 on the top floor in the horizontal direction extended between a pair of vertical earthquake resisting frames 28v to extend horizontal earthquake resisting frames 28h so as to connect a pair of vertical earthquake resisting frames 28v of both ends in the longitudinal direction, and as a whole, U-shaped earthquake resisting frames are constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic retrofit structure for an RC or SRC existing building such as a plate-shaped housing complex.

[0002]

2. Description of the Related Art Conventionally, in an existing building such as a plate-shaped apartment house constructed by RC construction or SRC construction, as shown in FIG. 3, columns 2 facing each other in the direction between the beams 1 and 1 (X direction in the figure). 2 ... are connected to each other by partition walls 3, 3 ,.
3 ... Each housing unit is configured in between.
In addition, the girder direction of both outer edges in the direction between the beams 1 and 1 (Y in the figure)
In the direction), a corridor 4 is formed on one side and a balcony 5 is formed on the other side. An unillustrated door is provided on the corridor 4 side between the partition walls 3, 3... Constituting each dwelling unit, and an unillustrated glass door or the like is built on the balcony 5 side.

[0003]

However, in such a conventional existing building, in the direction (X direction) between the beams 1, 1 in which the partition walls 3, 3,... Exist, these partition walls 3, 3,. While the required strength against earthquakes can be secured by forming a seismic wall, the opening area is large in the girder direction (Y direction) because of the doors and glass doors that lead to the corridor 4 and balcony 5 of each dwelling unit. However, it was difficult to secure sufficient strength against earthquakes.

As a method of increasing the strength in the girder direction of the existing building, the outer periphery of the pillars 2, 2,... Is wound with an iron plate 6, or the pillars 2, 2,. It is conceivable to add a part of the earthquake-resistant walls 7 and 8. However, since such reinforcement work will extend into the room of each dwelling unit, each dwelling unit must be individually constructed, and even in each dwelling unit, the furniture will be considered while considering the convenience of the resident. It is necessary to carry out the construction after moving, dust-proofing, and sound-proofing, etc., and the workability is not good. Furthermore, even if such consideration is taken, it will seriously hinder the resident's daily life. It is necessary to consider the relocation of residents during the construction period, and there are various problems in construction.

In view of such conventional problems, the present invention has already been made to efficiently carry out a reinforcement work that can maintain the use of dwelling units and reduce the damage of the earthquake without hindering the resident's daily life. It is intended to provide a seismic reinforcement structure for a building.

[0006]

In order to achieve the above object, the present invention is an RC structure or an SRC structure in which a plurality of partition walls along the beam direction are arranged in parallel in the girder direction and the space between the partition walls is a room space. In the existing building, vertical seismic frames were added by vertically connecting seismic elements from the lower floor to the upper floor on both sides of the room space at both ends in the girder direction in the beam direction.

Further, in such a reinforcing structure, so as to connect the pair of vertical seismic frames at both ends in the girder direction of the existing building, on both sides in the beam direction of the room space, as appropriate.
You may make it add a horizontal seismic-resistant frame by connecting a horizontal seismic-resistant element continuously between said pair of vertical seismic-resistant frames.

Therefore, in the seismic retrofit structure for an existing building of the present invention, a pair of vertical seismic frames are provided on both sides in the beam direction of the existing building, and a horizontal seismic seismic connection connecting the pair of vertical seismic frames in the horizontal direction. Since the frame and structure will be added,
When the seismic force acts on the existing building, the seismic force can be borne by these seismic structures, and the damage to the existing building due to the earthquake can be greatly reduced.

Therefore, in the seismic retrofit structure of the existing building of the present invention, since a pair of vertical seismic frames are added at both ends in the girder direction of the existing building on both sides in the beam-to-beam direction, seismic force can be added to the existing building. When this occurs, the seismic force can be borne by the earthquake-resistant frame, and the damage to the existing building due to the earthquake can be greatly reduced.

Furthermore, if a horizontal seismic frame is added to connect a pair of vertical seismic frames to each other in the horizontal direction, the horizontal seismic frame constrains both vertical seismic frames to each other. The existing building can be further reinforced.

The room space provided with the seismic resistant element may be used as a room space for living after the construction is completed, but since the seismic resistant element is attached to both sides in the beam direction, it is different from a general dwelling unit. The space can also be used as a trunk room or staircase space, and in this way, even a room space equipped with seismic resistant elements can be effectively used.

[0012] Even during the seismic retrofitting construction period for constructing the seismic resistant frame, it is possible to continue using the dwelling unit in the room space other than the room space where the seismic element is attached,
The construction will not interfere with daily life. By adding the above-mentioned seismic frame without disturbing the daily lives of residents in this way, seismic strengthening work itself can be efficiently constructed and the construction period can be shortened. It is possible to obtain a seismic retrofit structure that is preferable to residents from both aspects of construction.

[0013]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show an earthquake-proof reinforcing structure for an existing building showing an embodiment of the present invention. FIG. 1 is a cross-sectional plan view of the existing building cut at an arbitrary floor, and FIG. 2 is a front view of the entire existing building.

In the present embodiment, basically, a plurality of partition walls 16 along the beam direction (X direction) are arranged side by side in the girder direction (Y direction), and the space between the partition walls 16 is a room space, that is, a dwelling unit 18. In the existing building 10 of RC construction or SRC construction, earthquake-resistant walls 24 are vertically arranged as seismic-resistant elements from the lower floor to the upper floor on both sides in the beam direction (X direction) of the dwelling units 18 at both ends in the girder direction (Y direction). Vertical seismic frame 2
With the addition of 8 v, the pair of vertical seismic resistances on both sides of the beam of the dwelling unit 18 on the floor (X direction) are connected so as to connect the pair of vertical seismic resistant frames 28v at both ends of the girder direction (Y direction). A horizontal seismic frame 2 is constructed by connecting a seismic wall 26 as a seismic element horizontally across the frames 28v.
It is configured by adding 8h.

The existing building 10 of this embodiment is constructed as an RC or SRC plate-like apartment house in the same manner as in the prior art, and each existing building is arranged in two rows in parallel to the column direction (Y direction). A pair of existing beams 1 between columns 12, 12 ...
It is connected by 4,14. Then, the beams 14, 14
Existing columns 12, 12 facing each other in the space direction (X direction)
, Are connected by the partition walls 16, 16 provided along the beam-to-beam direction (X direction), so that the dwelling units 18, 18 which are room spaces between the partition walls 16, 16 ...
Is configured.

A corridor 20 is provided on one side (upper side in FIG. 1) of the existing building 10 between the beams 14 and 14, and a balcony 22 is provided on the other side (lower side in FIG. 1) in the column direction (Y). Direction).

Here, in this embodiment, the existing building 10 is used.
Seismic walls 24, 24 ... are newly installed as vertical seismic elements continuously from the first floor to the top floor on both sides in the beam direction of the dwelling units 18, 18 located at both ends in the girder direction of the vertical direction. Add frame 28v. The vertical seismic frame 28v, which makes a pair in the girder direction,
28 v are installed horizontally on both sides of the beams of all the dwelling units 18, 18 on the top floor as horizontal seismic elements so that the upper end portions of 28 v are connected horizontally, and thereby horizontal seismic resistance is achieved. Add frame 28h. And in this embodiment, the said vertical direction earthquake-resistant frame 28v, 28v
The horizontal seismic frame 28h constitutes a U-shaped seismic frame as a whole.

By the way, the earthquake-resistant walls 24, 24, ... And 26, 26 may be fitted between the upper and lower sides of the beams 14 and 14 on the upper and lower floors to be integrally joined, or the beam 1 on the upper and lower floors.
It is also possible to span the inner surfaces or outer surfaces of 4, 14 to integrally join them.

As described above, in the seismic reinforcement structure of the existing building of the present embodiment, the pair of vertical seismic frames 28v, 28 located at both ends of the existing building 10 in the column direction (Y direction).
v and a horizontal seismic frame 28h that horizontally connects the pair of vertical seismic frames 28v, 28v along the girder direction (Y direction), a U-shaped seismic frame is added as a whole, so When the existing building 10 is acted on, the seismic force can be borne by the seismic resistant frames 28h, 28v, 28v, the existing building 10 can be reinforced and the damage caused by the earthquake can be greatly reduced.

A dwelling unit 1 provided with the earthquake resistant walls 24 and 26
Although 8 may be used for living after the completion of construction, it is different from general dwelling units because the earthquake resistant walls 24 and 26 are attached to both sides in the beam direction, so the space may be used as a trunk room or stair space. By doing so, even in the space where the earthquake resistant walls 24 and 26 are attached, it can be effectively used.

Even during the seismic reinforcement work for constructing the seismic frame 28h, 28v, the seismic walls 24, 2
The dwelling units 18 other than the dwelling unit 18 to which 6 is attached can continue to be used, and the construction does not interfere with daily life. In this way, the seismic frame 28h, 2 is designed so as not to interfere with the daily life of the residents.
By being able to add 8v, it is possible to efficiently construct the seismic reinforcement work itself, shorten the construction period, and obtain a seismic reinforcement structure that is preferable for residents in terms of both reduction of earthquake damage and short-term construction.

In the above-described embodiment, the earthquake resistant walls 24 and 26 are illustrated as the earthquake resistant elements, but the invention is not limited to this, and a brace frame or various known structural materials having a vibration absorbing function may be adopted. .

Further, an example in which the vertical aseismic frame 28v is added over the range from the first floor to the top floor has been shown, but this aseismic frame 28v may be continuously extended from the lower floor to the upper floor. The range does not matter. Also, an example in which the horizontal seismic frame 28h is added to the uppermost floor is shown, but even with this seismic frame 28h, a pair of vertical seismic frame 28h
It does not matter which floor is used for connecting the v and 28v as long as they are connected. Therefore, in some cases, an H-shaped seismic frame is constructed as a whole. In addition, horizontal seismic frame 2
It is also possible to construct the seismic strengthening structure with only the vertical seismic frame 28v, 28v without adding 8h.

[0024]

As described above, in the seismic retrofit structure for an existing building of the present invention, a pair of vertical seismic frames are added at both ends in the girder direction of the existing building on both sides in the beam direction. Therefore, when the seismic force acts on the existing building, this seismic force can be borne by the seismic frame, and the damage to the existing building due to the earthquake can be significantly reduced.

Furthermore, if a horizontal seismic frame is added to connect a pair of vertical seismic frames to each other in the horizontal direction, the horizontal seismic frame constrains both vertical seismic frames to each other. The existing building can be further reinforced.

Further, the room space provided with the seismic resistant element can be used as a room space for living after the construction is completed, but on the other hand, the seismic resistant element is installed on both sides in the beam direction so that it is different from a general dwelling unit. In consideration of the difference, the room space can be used as a trunk room or a staircase space, and in this way, even a room space with a seismic element can be effectively used.

Further, even during the period of the seismic retrofitting work for constructing the seismic resistant frame, it is possible to continue to use the dwelling units in the room space other than the room space where the seismic resistant element is installed, and the construction hinders daily life. It will not be done. By adding the above-mentioned seismic frame without disturbing the daily lives of residents, the seismic retrofitting work itself can be efficiently constructed and the construction period can be shortened. It has various excellent effects that it is possible to obtain a seismic strengthening structure that is preferable to residents from both aspects of construction.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of an existing building showing an embodiment of an earthquake-proof reinforcement structure of the existing building, taken along an arbitrary floor.

FIG. 2 is a front view of the entire existing building showing an embodiment of the seismic retrofit structure for the existing building according to the present invention.

FIG. 3 is a cross-sectional plan view showing a conventional earthquake-proof reinforcement method for an existing building.

[Explanation of symbols]

 10 Existing Building 12 Existing Column 14 Existing Beam 16 Partition Wall 18 Dwelling Unit 24 Seismic Wall 26 Seismic Wall 28h Horizontal Seismic Frame 28v Vertical Seismic Frame

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuaki Tsuda 4-640 Shimo-Seido, Kiyose-shi, Tokyo Inside Obayashi Technical Research Institute, Inc. (72) Inventor Yoshikazu Utsumi 4-640 Shimo-Seido, Kiyose-shi, Tokyo Obayashi Engineering In the laboratory

Claims (2)

[Claims] 1. An RC or SRC existing building in which a plurality of partition walls along the beam direction are arranged side by side in the girder direction and the space between the partition walls is a room space. In addition, the seismic retrofit structure of the existing building is characterized in that a vertical seismic frame is added by vertically connecting seismic elements from the lower floor to the upper floor. 2. The horizontal space between the pair of vertical seismic frames is appropriately provided on both sides of the room space on the floor in the beam direction so as to connect the pair of vertical seismic frames at both ends in the girder direction of the existing building. The seismic reinforcement structure for an existing building according to claim 1, wherein seismic reinforcement elements are connected in a row to add a horizontal seismic frame.